SOLVED Shrink error 0x80042574 while enabling Bitlocker

[Gary398457]

Current Windows 10 (build 10240): I'm trying to turn on Bitlocker on my system drive, an SSD. During Bitlocker's preparation, shrinking the volume, I get error 0x80042574, and Bitlocker enabling will not proceed. The SSD reports 46.5 GB free out of 238 GB, and scanning it reports no errors. Any advice?

(This is a UEFI system, and the system SSD has a 100 MB EFI system partition.)

 

[Gary398457]

According to the Event Viewer, the problem is:

Error: a file blocked volume shrink on volume Main (C.

Diagnostic details:
- The last unmovable file appears to be: \System Volume Information\FVE2.{c9ca54a3-6983-46b7-8684-a7e5e23499e3}.67::$DATA
- The last cluster of the file is: 0x3b8cbbf
- Shrink potential target (LCN address): 0x3b793e8
- The NTFS file flags are: ---AD
- Shrink phase: <check>​

 

[Gary398457]

Problem solved by using an third-party partition manager (EaseUS free version) to shrink C: Then BitLocker was successfully enabled on C:

 

[Trouble]

Thanks for the details as to how you managed to resolve your issue.
I, personally had no clue as to how to help your with your issue so I'm glad to hear that your managed to resolve it on your own.